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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Animals which have only one estrous cycle (ex: dog - fox)






2. % of fat in milk. makes cheeses and ice cream. regulates cost of milk






3. Superior genes are _______ to multiply






4. Way to know everything is alright with the breeding male






5. ~60 days before calving






6. 1. reproduction - 2. mastitis/udder problems - 3. low milk production - 4. soundness/poor feet and legs (living on concrete)






7. Castration tool that uses a band around the testicles which cuts off circulation and eventually the testicles fall off






8. Animals which have only one estrous cycle (ex: dog - fox)






9. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.






10. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.






11. Larger the cow - more milk is produced; smaller the cow - less milk is produced






12. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat






13. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)






14. ~305 days (altough often longer due to breeding difficulties)






15. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).






16. 30 hours after estrus begins






17. 45-60 days after breeding; re-breed as required






18. Birthing process (termination of gestation)






19. Can survive ~7 days in cow. vast majority <48 hours






20. Produce testosterone. located between the seminiferous tubules






21. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg






22. Provide nourishment for the developing sperm






23. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells






24. (male) pushes the testes upward toward the body for warmth or protection






25. Days which have increasing daylight hours

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26. 1. to eliminate breeding the females at an early age - 2. makes animals less lean and provides a better cut for the market






27. Serves as a bone cradle for the reproductive system. used greatly in palpation as a 'landmark'.






28. When are steers and heifers weaned from bottle feeding?






29. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.






30. Allows extension of penis without fibro-elastic penis






31. (switzerland) 2nd in size and milk production - most muscle -






32. What makes the milk flow through the mammary glands?






33. FEED






34. Located directly in front of the cervix. fertilized egg implants here. connected to two uterine horns. implantation occurs on the same side as ovulation occurred.






35. 1. visual evaluation - 2. scrotal circumference - 3. penis and prepuce observation - 4. rectal palpation - 5. libido test - 6. semen evaluation






36. ~305 days (altough often longer due to breeding difficulties)






37. Important 'landmark' during palpation






38. Milk ~305 days - dry 60 days prior to calving






39. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.






40. Birthing process (termination of gestation)






41. 147 days






42. (male) Primary sex organ - produces sperm (male gamete) and male sex hormones - 2 total






43. Help to signal hormone levels which we need both in the brain right next to each other.






44. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.

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45. 26 hours after estrus begins






46. 10-37 (21) days






47. What about the sperm for a bull which has been castrated but still has testicles?






48. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.

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49. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %






50. 14-19 (17) days